19674729900 has 540 divisors, whose sum is σ = 78125077800. Its totient is φ = 4258759680.

The previous prime is 19674729859. The next prime is 19674729911. The reversal of 19674729900 is 992747691.

It is a tau number, because it is divible by the number of its divisors (540).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 179 ways as a sum of consecutive naturals, for example, 7539796 + ... + 7542404.

It is an arithmetic number, because the mean of its divisors is an integer number (144676070).

Almost surely, 2^19674729900 is an apocalyptic number.

19674729900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19674729900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39062538900).

19674729900 is an abundant number, since it is smaller than the sum of its proper divisors (58450347900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19674729900 is a wasteful number, since it uses less digits than its factorization.

19674729900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2668 (or 2645 counting only the distinct ones).

The product of its (nonzero) digits is 1714608, while the sum is 54.

The spelling of 19674729900 in words is "nineteen billion, six hundred seventy-four million, seven hundred twenty-nine thousand, nine hundred".